Remove unused crypto files tagged by CodeQL, Fixes AB#3301719 (#2676)

[AB#3301719](https://identitydivision.visualstudio.com/fac9d424-53d2-45c0-91b5-ef6ba7a6bf26/_workitems/edit/3301719)

Author: p3dr0rv

LabApiUtilities/src/main/com/microsoft/identity/labapi/utilities/authentication/common/MicrosoftClientAssertion.java

@@ -135,7 +135,7 @@ private SignedJWT createSignedJwt(@NonNull final String clientId,
 
         private Base64URL createSHA1ThumbPrint(@NonNull final X509Certificate clientCertificate)
                 throws CertificateEncodingException, NoSuchAlgorithmException {
-            final MessageDigest mdSha1 = MessageDigest.getInstance(THUMBPRINT_ALGORITHM);
+            final MessageDigest mdSha1 = MessageDigest.getInstance(THUMBPRINT_ALGORITHM); // CodeQL [SM05136] - This is test-only helper code, not used in production
             mdSha1.reset();
             mdSha1.update(clientCertificate.getEncoded());
             return new Base64URL(Base64.encode(mdSha1.digest()).toString());